bug#43128: 27.1; DPI change not detected after switching to Emacs 27.1

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* bug#43128: 27.1; DPI change not detected after switching to Emacs 27.1
@ 2020-08-31  7:31 Vincent Bernat
       [not found] ` <handler.43128.B.15988596567523.ack@debbugs.gnu.org>
  2022-10-29 12:30 ` bug#43128: Changed the font selection after 52d4c98cec0901ef5cc1c55d5b3b33ac9d9c519f OGAWA Hirofumi
  0 siblings, 2 replies; 18+ messages in thread
From: Vincent Bernat @ 2020-08-31  7:31 UTC (permalink / raw)
  To: 43128


After upgrading from Emacs 26.3 (GTK backend) to Emacs 27.1 (GTK
backend), DPI changes are not detected anymore. I am using a laptop with
a HiDPI screen (144 dpi) and when switching to a regular external DPI
monitor (96 dpi), nothing is scaled down.

The change is signalled through XSETTINGS (using xsettingsd daemon in my
case). I have tried to look at the source code to check if there was a
way to detect if the change was detected but not applied, without
success. Also, a new frame on the same display still has its fonts
scaled incorrectly.

Thanks.



In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22, cairo version 1.16.0)
 of 2020-08-24, modified by Debian built on x86-grnet-01
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid

Recent messages:
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Configured using:
 'configure --build x86_64-linux-gnu --prefix=/usr
 --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var/lib --infodir=/usr/share/info
 --mandir=/usr/share/man --enable-libsystemd --with-pop=yes
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Configured features:
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INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
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JSON PDUMPER LCMS2 GMP

Important settings:
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Major mode: C/*l

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/home/bernat/.emacs.d/site-lisp/org-9.3.6/org-archive hides /usr/share/emacs/27.1/lisp/org/org-archive
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-lilypond hides /usr/share/emacs/27.1/lisp/org/ob-lilypond
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-awk hides /usr/share/emacs/27.1/lisp/org/ob-awk
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-groovy hides /usr/share/emacs/27.1/lisp/org/ob-groovy
/home/bernat/.emacs.d/site-lisp/org-9.3.6/org-entities hides /usr/share/emacs/27.1/lisp/org/org-entities
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ox-man hides /usr/share/emacs/27.1/lisp/org/ox-man
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/home/bernat/.emacs.d/site-lisp/org-9.3.6/ol-eshell hides /usr/share/emacs/27.1/lisp/org/ol-eshell
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-eshell hides /usr/share/emacs/27.1/lisp/org/ob-eshell
/home/bernat/.emacs.d/site-lisp/org-9.3.6/org-num hides /usr/share/emacs/27.1/lisp/org/org-num
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-perl hides /usr/share/emacs/27.1/lisp/org/ob-perl
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-stan hides /usr/share/emacs/27.1/lisp/org/ob-stan
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-lob hides /usr/share/emacs/27.1/lisp/org/ob-lob
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ox-org hides /usr/share/emacs/27.1/lisp/org/ox-org
/home/bernat/.emacs.d/site-lisp/org-9.3.6/org-keys hides /usr/share/emacs/27.1/lisp/org/org-keys
/home/bernat/.emacs.d/site-lisp/org-9.3.6/org-table hides /usr/share/emacs/27.1/lisp/org/org-table
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-lua hides /usr/share/emacs/27.1/lisp/org/ob-lua
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-hledger hides /usr/share/emacs/27.1/lisp/org/ob-hledger
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-clojure hides /usr/share/emacs/27.1/lisp/org/ob-clojure
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-ref hides /usr/share/emacs/27.1/lisp/org/ob-ref
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ox hides /usr/share/emacs/27.1/lisp/org/ox
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-J hides /usr/share/emacs/27.1/lisp/org/ob-J
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-matlab hides /usr/share/emacs/27.1/lisp/org/ob-matlab
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-maxima hides /usr/share/emacs/27.1/lisp/org/ob-maxima
/home/bernat/.emacs.d/site-lisp/org-9.3.6/ob-shen hides /usr/share/emacs/27.1/lisp/org/ob-shen

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cl-print debug rect term/screen term/xterm xterm markdown-mode
edit-indirect cursor-sensor js2-mode warnings js cc-mode cc-fonts
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jinja2-mode sgml-mode yaml-mode shr-color rst dumb-jump popup projectile
grep ibuf-ext ibuffer ibuffer-loaddefs python tramp-sh tramp
tramp-loaddefs trampver tramp-integration files-x tramp-compat ls-lisp
pp bbdb-message sendmail git-rebase nix-mode ffap smie nix-repl
nix-shell nix-store nix-instantiate nix-shebang nix-format nix gnus-kill
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arc-mode archive-mode ht gnus-ml gnus-agent gnus-srvr gnus-score
score-mode nnvirtual nndraft nnmh utf-7 gnus-cache bbdb-gnus
network-stream nntp vbe-gnus bbdb-mua vbe-gnus-identities
gnus-identities vbe-gnus-looks gnus-topic vbe-gnus-general gnus-gravatar
mail-extr gravatar url-cache spam spam-stat bbdb-com bbdb bbdb-site
timezone gnus-uu yenc vbe-mbsync nnir gnus-icalendar org-capture
vbe-orgmode ox-reveal ox-odt rng-loc rng-uri rng-parse rng-match rng-dt
rng-util rng-pttrn nxml-parse nxml-ns nxml-enc xmltok nxml-util ox-latex
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naquadah-theme hl-line paren vbe-common exec-path-from-shell
dash-functional f dash s vbe-package quelpa-use-package quelpa mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util
ietf-drums mail-prsvr lisp-mnt help-fns radix-tree cus-edit cus-start
cus-load wid-edit diminish cl-extra help-mode use-package
use-package-ensure use-package-delight use-package-diminish
use-package-bind-key bind-key easy-mmode use-package-core derived
finder-inf tex-site edmacro kmacro rx dpkg-dev-el info debian-el vbe-tls
nsm rmc tls gnutls puny package easymenu browse-url url-handlers
url-parse auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache json subr-x map url-vars seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode elisp-mode lisp-mode
prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite charscript charprop case-table epa-hook
jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice loaddefs
button faces cus-face macroexp files text-properties overlay sha1 md5
base64 format env code-pages mule custom widget hashtable-print-readable
backquote threads dbusbind inotify lcms2 dynamic-setting
system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit
x multi-tty make-network-process emacs)

Memory information:
((conses 16 1554451 810098)
 (symbols 48 73742 4)
 (strings 32 391691 79664)
 (string-bytes 1 18314672)
 (vectors 16 150772)
 (vector-slots 8 4494952 144006)
 (floats 8 818 1868)
 (intervals 56 52958 19479)
 (buffers 1000 149))





^ permalink raw reply	[flat|nested] 18+ messages in thread

[parent not found: <handler.43128.B.15988596567523.ack@debbugs.gnu.org>]

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
       [not found] ` <handler.43128.B.15988596567523.ack@debbugs.gnu.org>
@ 2020-09-02  7:28   ` Vincent Bernat
  2020-09-02  7:51     ` Vincent Bernat
  2020-09-02  7:58     ` YAMAMOTO Mitsuharu
  0 siblings, 2 replies; 18+ messages in thread
From: Vincent Bernat @ 2020-09-02  7:28 UTC (permalink / raw)
  To: 43128

Hey!

After investigating a bit, I see that `read_settings()' is correctly
called and the DPI retrieved is correct. However, `apply_xft_settings()'
seems to be a noop for me. I am using the Debian package for
experimental. In the build logs, for the GTK build:

#v+
cd debian/build-gtk && CFLAGS="-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall" CPPFLAGS="-Wdate-time -D_FORTIFY_SOURCE=2" LDFLAGS="-Wl,-z,relro" REL_ALLOC=no /<<PKGBUILDDIR>>/debian/build-src/configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --enable-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --enable-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --with-cairo --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars
[...]
  Does Emacs use -lxft?                                   no
#v-

The lucid build has XFT:

#v+
cd debian/build-lucid && CFLAGS="-g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wall" CPPFLAGS="-Wdate-time -D_FORTIFY_SOURCE=2" LDFLAGS="-Wl,-z,relro" REL_ALLOC=no /<<PKGBUILDDIR>>/debian/build-src/configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --enable-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --enable-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/27.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/27.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --with-x=yes --with-x-toolkit=lucid --with-toolkit-scroll-bars --without-gsettings
#v-

Looking at the differences in the build, I see the GTK build tests until
FreeType then it doesn't look further for Xft:

#v+
checking for cairo >= 1.8.0... yes
checking for freetype2... yes
checking for fontconfig >= 2.2.0... yes
#v-

From configure.ac, I see that I go into the Cairo branch which disables
Xft:

#+begin_src sh
  if test $HAVE_CAIRO = yes; then
    dnl Strict linkers fail with
    dnl ftfont.o: undefined reference to symbol 'FT_New_Face'
    dnl if -lfreetype is not specified.
    dnl The following is needed to set FREETYPE_LIBS.
    EMACS_CHECK_MODULES([FREETYPE], [freetype2])

    test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(cairo requires libfreetype)

    EMACS_CHECK_MODULES([FONTCONFIG], [fontconfig >= 2.2.0])

    test "$HAVE_FONTCONFIG" = "no" && AC_MSG_ERROR(cairo requires libfontconfig)
    dnl For the "Does Emacs use" message at the end.
    HAVE_XFT=no
#+end_src

So, no XFT seems to mean, no DPI change is possible. Is that expected?
-- 
Make sure input cannot violate the limits of the program.
            - The Elements of Programming Style (Kernighan & Plauger)

^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02  7:28   ` bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1) Vincent Bernat
@ 2020-09-02  7:51     ` Vincent Bernat
  2020-09-02  7:58     ` YAMAMOTO Mitsuharu
  1 sibling, 0 replies; 18+ messages in thread
From: Vincent Bernat @ 2020-09-02  7:51 UTC (permalink / raw)
  To: 43128

 ❦  2 septembre 2020 09:28 +02, Vincent Bernat:

> From configure.ac, I see that I go into the Cairo branch which disables
> Xft:
>
> #+begin_src sh
>   if test $HAVE_CAIRO = yes; then
>     dnl Strict linkers fail with
>     dnl ftfont.o: undefined reference to symbol 'FT_New_Face'
>     dnl if -lfreetype is not specified.
>     dnl The following is needed to set FREETYPE_LIBS.
>     EMACS_CHECK_MODULES([FREETYPE], [freetype2])
>
>     test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(cairo requires libfreetype)
>
>     EMACS_CHECK_MODULES([FONTCONFIG], [fontconfig >= 2.2.0])
>
>     test "$HAVE_FONTCONFIG" = "no" && AC_MSG_ERROR(cairo requires libfontconfig)
>     dnl For the "Does Emacs use" message at the end.
>     HAVE_XFT=no
> #+end_src
>
> So, no XFT seems to mean, no DPI change is possible. Is that expected?

Disabling Cairo fixes the problem for me.
-- 
Program defensively.
            - The Elements of Programming Style (Kernighan & Plauger)





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02  7:28   ` bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1) Vincent Bernat
  2020-09-02  7:51     ` Vincent Bernat
@ 2020-09-02  7:58     ` YAMAMOTO Mitsuharu
  2020-09-02  8:20       ` Vincent Bernat
  2020-09-02 14:18       ` Eli Zaretskii
  1 sibling, 2 replies; 18+ messages in thread
From: YAMAMOTO Mitsuharu @ 2020-09-02  7:58 UTC (permalink / raw)
  To: Vincent Bernat; +Cc: 43128

On Wed, 02 Sep 2020 16:28:38 +0900,
Vincent Bernat wrote:
> 
> Hey!
> 
> After investigating a bit, I see that `read_settings()' is correctly
> called and the DPI retrieved is correct. However, `apply_xft_settings()'
> seems to be a noop for me.

The function apply_xft_settings wasn't a no-op when I originally
removed the dependency on Xft if USE_CAIRO.  But it was changed to a
no-op as a workaround for Bug#36284.

As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
a proper fix would be to implement replacements for
XftDefaultSubstitute and XftDefaultSet.

				     YAMAMOTO Mitsuharu
				mituharu@math.s.chiba-u.ac.jp





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02  7:58     ` YAMAMOTO Mitsuharu
@ 2020-09-02  8:20       ` Vincent Bernat
  2020-09-02 14:16         ` Eli Zaretskii
  2020-09-02 14:18       ` Eli Zaretskii
  1 sibling, 1 reply; 18+ messages in thread
From: Vincent Bernat @ 2020-09-02  8:20 UTC (permalink / raw)
  To: YAMAMOTO Mitsuharu; +Cc: 43128

 ❦  2 septembre 2020 16:58 +09, YAMAMOTO Mitsuharu:

>> After investigating a bit, I see that `read_settings()' is correctly
>> called and the DPI retrieved is correct. However, `apply_xft_settings()'
>> seems to be a noop for me.
>
> The function apply_xft_settings wasn't a no-op when I originally
> removed the dependency on Xft if USE_CAIRO.  But it was changed to a
> no-op as a workaround for Bug#36284.

It may be a bit late now that 27.1 is released, but #36284 has an easy
workaround of moving the default face outside init, while not being able
to adapt to the current desktop DPI settings has no obvious workaround
except restarting Emacs. I'll just compile Emacs without Cairo support
for now.
-- 
Let me take you a button-hole lower.
		-- William Shakespeare, "Love's Labour's Lost"





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02  8:20       ` Vincent Bernat
@ 2020-09-02 14:16         ` Eli Zaretskii
  2020-09-02 18:10           ` Vincent Bernat
  0 siblings, 1 reply; 18+ messages in thread
From: Eli Zaretskii @ 2020-09-02 14:16 UTC (permalink / raw)
  To: Vincent Bernat; +Cc: 43128

> From: Vincent Bernat <bernat@luffy.cx>
> Date: Wed, 02 Sep 2020 10:20:18 +0200
> Cc: 43128@debbugs.gnu.org
> 
> It may be a bit late now that 27.1 is released, but #36284 has an easy
> workaround of moving the default face outside init

Can you elaborate on that workaround?  I don't think I understand what
you mean by "moving the default face outside init".  Did you mean some
code change? if so, could you tell more about the change you had in
mind?





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02 14:16         ` Eli Zaretskii
@ 2020-09-02 18:10           ` Vincent Bernat
  0 siblings, 0 replies; 18+ messages in thread
From: Vincent Bernat @ 2020-09-02 18:10 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 43128

 ❦  2 septembre 2020 17:16 +03, Eli Zaretskii:

>> It may be a bit late now that 27.1 is released, but #36284 has an easy
>> workaround of moving the default face outside init
>
> Can you elaborate on that workaround?  I don't think I understand what
> you mean by "moving the default face outside init".  Did you mean some
> code change? if so, could you tell more about the change you had in
> mind?

Oh, sorry, I thought the problem was when setting font in the early
init. In this case, the workaround would have been to move it to the
regular init. So, nevermind.
-- 
All things that are, are with more spirit chased than enjoyed.
		-- Shakespeare, "Merchant of Venice"





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02  7:58     ` YAMAMOTO Mitsuharu
  2020-09-02  8:20       ` Vincent Bernat
@ 2020-09-02 14:18       ` Eli Zaretskii
  2020-11-23 17:36         ` Eli Zaretskii
  1 sibling, 1 reply; 18+ messages in thread
From: Eli Zaretskii @ 2020-09-02 14:18 UTC (permalink / raw)
  To: YAMAMOTO Mitsuharu; +Cc: 43128, bernat

> Date: Wed, 02 Sep 2020 16:58:59 +0900
> From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> Cc: 43128@debbugs.gnu.org
> 
> > After investigating a bit, I see that `read_settings()' is correctly
> > called and the DPI retrieved is correct. However, `apply_xft_settings()'
> > seems to be a noop for me.
> 
> The function apply_xft_settings wasn't a no-op when I originally
> removed the dependency on Xft if USE_CAIRO.  But it was changed to a
> no-op as a workaround for Bug#36284.

Bug#36284 seems to be about an issue unrelated to DPI scaling.  is
there perhaps a way to keep parts of it that will allow to adapt to
the DPI change?

> As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
> a proper fix would be to implement replacements for
> XftDefaultSubstitute and XftDefaultSet.

How complicate will such a change be?  Will it be simple and safe
enough to allow installing such a change on the emacs-27 branch?

Thanks.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-09-02 14:18       ` Eli Zaretskii
@ 2020-11-23 17:36         ` Eli Zaretskii
  2021-07-18 21:38           ` Vincent Bernat
  0 siblings, 1 reply; 18+ messages in thread
From: Eli Zaretskii @ 2020-11-23 17:36 UTC (permalink / raw)
  To: mituharu; +Cc: 43128, bernat

> Date: Wed, 02 Sep 2020 17:18:40 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 43128@debbugs.gnu.org, bernat@luffy.cx
> 
> > Date: Wed, 02 Sep 2020 16:58:59 +0900
> > From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
> > Cc: 43128@debbugs.gnu.org
> > 
> > > After investigating a bit, I see that `read_settings()' is correctly
> > > called and the DPI retrieved is correct. However, `apply_xft_settings()'
> > > seems to be a noop for me.
> > 
> > The function apply_xft_settings wasn't a no-op when I originally
> > removed the dependency on Xft if USE_CAIRO.  But it was changed to a
> > no-op as a workaround for Bug#36284.
> 
> Bug#36284 seems to be about an issue unrelated to DPI scaling.  is
> there perhaps a way to keep parts of it that will allow to adapt to
> the DPI change?
> 
> > As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
> > a proper fix would be to implement replacements for
> > XftDefaultSubstitute and XftDefaultSet.
> 
> How complicate will such a change be?  Will it be simple and safe
> enough to allow installing such a change on the emacs-27 branch?

Ping!  Could we please try solving this for Emacs 27.2?  Mitsuharu,
could you please show the fix you had in mind back then?

Thanks.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2020-11-23 17:36         ` Eli Zaretskii
@ 2021-07-18 21:38           ` Vincent Bernat
  2021-07-19 12:03             ` Eli Zaretskii
  0 siblings, 1 reply; 18+ messages in thread
From: Vincent Bernat @ 2021-07-18 21:38 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 43128

 ❦ 23 November 2020 19:36 +02, Eli Zaretskii:

>> > As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
>> > a proper fix would be to implement replacements for
>> > XftDefaultSubstitute and XftDefaultSet.
>> 
>> How complicate will such a change be?  Will it be simple and safe
>> enough to allow installing such a change on the emacs-27 branch?
>
> Ping!  Could we please try solving this for Emacs 27.2?  Mitsuharu,
> could you please show the fix you had in mind back then?

Hey! Is there any news around this? The XFT backend seems to have some
issues with TTC fonts that the Cairo backend does not.
-- 
Terminate input by end-of-file or marker, not by count.
            - The Elements of Programming Style (Kernighan & Plauger)





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2021-07-18 21:38           ` Vincent Bernat
@ 2021-07-19 12:03             ` Eli Zaretskii
  2021-07-19 12:09               ` Vincent Bernat
  0 siblings, 1 reply; 18+ messages in thread
From: Eli Zaretskii @ 2021-07-19 12:03 UTC (permalink / raw)
  To: Vincent Bernat; +Cc: 43128

> From: Vincent Bernat <bernat@luffy.cx>
> Cc: mituharu@math.s.chiba-u.ac.jp,  43128@debbugs.gnu.org
> Date: Sun, 18 Jul 2021 23:38:24 +0200
> 
>  ❦ 23 November 2020 19:36 +02, Eli Zaretskii:
> 
> >> > As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
> >> > a proper fix would be to implement replacements for
> >> > XftDefaultSubstitute and XftDefaultSet.
> >> 
> >> How complicate will such a change be?  Will it be simple and safe
> >> enough to allow installing such a change on the emacs-27 branch?
> >
> > Ping!  Could we please try solving this for Emacs 27.2?  Mitsuharu,
> > could you please show the fix you had in mind back then?
> 
> Hey! Is there any news around this? The XFT backend seems to have some
> issues with TTC fonts that the Cairo backend does not.

Sadly, no news yet.  Patches or ideas how to fix this are welcome.






^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2021-07-19 12:03             ` Eli Zaretskii
@ 2021-07-19 12:09               ` Vincent Bernat
  2022-10-25 21:02                 ` Vincent Bernat
  0 siblings, 1 reply; 18+ messages in thread
From: Vincent Bernat @ 2021-07-19 12:09 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 43128

 ❦ 19 July 2021 15:03 +03, Eli Zaretskii:

>> >> > As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
>> >> > a proper fix would be to implement replacements for
>> >> > XftDefaultSubstitute and XftDefaultSet.
>> >> 
>> >> How complicate will such a change be?  Will it be simple and safe
>> >> enough to allow installing such a change on the emacs-27 branch?
>> >
>> > Ping!  Could we please try solving this for Emacs 27.2?  Mitsuharu,
>> > could you please show the fix you had in mind back then?
>> 
>> Hey! Is there any news around this? The XFT backend seems to have some
>> issues with TTC fonts that the Cairo backend does not.
>
> Sadly, no news yet.  Patches or ideas how to fix this are welcome.

I'll try to do something, but I have no experience with either Xft or
Cairo, so if that's something clever to do, I am likely to fail.
-- 
Program defensively.
            - The Elements of Programming Style (Kernighan & Plauger)





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2021-07-19 12:09               ` Vincent Bernat
@ 2022-10-25 21:02                 ` Vincent Bernat
  2022-10-27 16:33                   ` Eli Zaretskii
  0 siblings, 1 reply; 18+ messages in thread
From: Vincent Bernat @ 2022-10-25 21:02 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 43128, mituharu

[-- Attachment #1: Type: text/plain, Size: 1132 bytes --]

On 2021-07-19 14:09, Vincent Bernat wrote:
>>>>>> As I mentioned in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36284#8,
>>>>>> a proper fix would be to implement replacements for
>>>>>> XftDefaultSubstitute and XftDefaultSet.
>>>>>
>>>>> How complicate will such a change be?  Will it be simple and safe
>>>>> enough to allow installing such a change on the emacs-27 branch?
>>>>
>>>> Ping!  Could we please try solving this for Emacs 27.2?  Mitsuharu,
>>>> could you please show the fix you had in mind back then?
>>>
>>> Hey! Is there any news around this? The XFT backend seems to have some
>>> issues with TTC fonts that the Cairo backend does not.
>>
>> Sadly, no news yet.  Patches or ideas how to fix this are welcome.
> 
> I'll try to do something, but I have no experience with either Xft or
> Cairo, so if that's something clever to do, I am likely to fail.

I was able to build this patch. I did replace XftDefaultSubstitute() by 
something that looks correct. However, for XftDefaultSet(), it seems 
there is no mechanism to override the defaults for fontconfig or cairo, 
so it seems not needed to find a substitute.

[-- Attachment #2: xsettings.diff --]
[-- Type: text/x-patch, Size: 1432 bytes --]

--- source/src/xsettings.c	1970-01-01 01:00:01.000000000 +0100
+++ source.new/src/xsettings.c	2022-10-25 22:50:26.350635015 +0200
@@ -608,16 +608,28 @@
 apply_xft_settings (struct x_display_info *dpyinfo,
                     struct xsettings *settings)
 {
-#ifdef HAVE_XFT
+#if defined USE_CAIRO || defined HAVE_XFT
   FcPattern *pat;
   struct xsettings oldsettings;
   bool changed = false;
+#ifndef HAVE_XFT
+  cairo_font_options_t *options;
+#endif
+
 
   memset (&oldsettings, 0, sizeof (oldsettings));
   pat = FcPatternCreate ();
+#ifdef HAVE_XFT
   XftDefaultSubstitute (dpyinfo->display,
                         XScreenNumberOfScreen (dpyinfo->screen),
                         pat);
+#else
+  FcConfigSubstitute (NULL, pat, FcMatchPattern);
+  options = cairo_font_options_create ();
+  cairo_ft_font_options_substitute (options, pat);
+  cairo_font_options_destroy (options);
+  FcDefaultSubstitute (pat);
+#endif
   FcPatternGetBool (pat, FC_ANTIALIAS, 0, &oldsettings.aa);
   FcPatternGetBool (pat, FC_HINTING, 0, &oldsettings.hinting);
 #ifdef FC_HINT_STYLE
@@ -716,8 +728,11 @@
 		     - sizeof "%f")
       };
       char buf[sizeof format + d_formats * d_growth + lf_formats * lf_growth];
-
+#ifdef HAVE_XFT
       XftDefaultSet (dpyinfo->display, pat);
+#else
+      FcPatternDestroy (pat);
+#endif
       store_config_changed_event (Qfont_render,
 				  XCAR (dpyinfo->name_list_element));
       Vxft_settings

^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2022-10-25 21:02                 ` Vincent Bernat
@ 2022-10-27 16:33                   ` Eli Zaretskii
  2022-10-27 16:55                     ` Vincent Bernat
  2022-10-28  0:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
  0 siblings, 2 replies; 18+ messages in thread
From: Eli Zaretskii @ 2022-10-27 16:33 UTC (permalink / raw)
  To: Vincent Bernat, Po Lu; +Cc: 43128, mituharu

> Date: Tue, 25 Oct 2022 23:02:16 +0200
> From: Vincent Bernat <bernat@luffy.cx>
> Cc: mituharu@math.s.chiba-u.ac.jp, 43128@debbugs.gnu.org
> 
> > I'll try to do something, but I have no experience with either Xft or
> > Cairo, so if that's something clever to do, I am likely to fail.
> 
> I was able to build this patch. I did replace XftDefaultSubstitute() by 
> something that looks correct. However, for XftDefaultSet(), it seems 
> there is no mechanism to override the defaults for fontconfig or cairo, 
> so it seems not needed to find a substitute.

Sorry, I don't understand.  Are you saying that the patch you posted
solves the problem for you?  Then what do you mean in the last
sentence above about XftDefaultSet?

Po Lu, can you please review the proposed patch and decide what to do
about this issue?  Or maybe it is already fixed in some other way on
master?

Thanks.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2022-10-27 16:33                   ` Eli Zaretskii
@ 2022-10-27 16:55                     ` Vincent Bernat
  2022-10-28  0:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
  1 sibling, 0 replies; 18+ messages in thread
From: Vincent Bernat @ 2022-10-27 16:55 UTC (permalink / raw)
  To: Eli Zaretskii, Po Lu; +Cc: 43128, mituharu

On 2022-10-27 18:33, Eli Zaretskii wrote:
>> Date: Tue, 25 Oct 2022 23:02:16 +0200
>> From: Vincent Bernat <bernat@luffy.cx>
>> Cc: mituharu@math.s.chiba-u.ac.jp, 43128@debbugs.gnu.org
>>
>>> I'll try to do something, but I have no experience with either Xft or
>>> Cairo, so if that's something clever to do, I am likely to fail.
>>
>> I was able to build this patch. I did replace XftDefaultSubstitute() by
>> something that looks correct. However, for XftDefaultSet(), it seems
>> there is no mechanism to override the defaults for fontconfig or cairo,
>> so it seems not needed to find a substitute.
> 
> Sorry, I don't understand.  Are you saying that the patch you posted
> solves the problem for you?  Then what do you mean in the last
> sentence above about XftDefaultSet?

The patch works for me, but I was unable to replace XftDefaultSet. From 
my understanding, while Xft has a way to override the defaults, this is 
not the case for fontconfig and Cairo. So, I suppose this is not needed 
for fontconfig and Cairo and other parts of the code should ensure the 
new settings are used without relying on defaults.

Also, the Cairo-specific part of the patch makes no difference for me. I 
have included it because Cairo documentation says to put it there.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2022-10-27 16:33                   ` Eli Zaretskii
  2022-10-27 16:55                     ` Vincent Bernat
@ 2022-10-28  0:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
  2022-10-28  7:30                       ` Eli Zaretskii
  1 sibling, 1 reply; 18+ messages in thread
From: Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2022-10-28  0:38 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: mituharu, 43128, Vincent Bernat

Eli Zaretskii <eliz@gnu.org> writes:

> Po Lu, can you please review the proposed patch and decide what to do
> about this issue?  Or maybe it is already fixed in some other way on
> master?

The patch LGTM, and no, the issue hasn't yet been fixed on master AFAIK.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1)
  2022-10-28  0:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
@ 2022-10-28  7:30                       ` Eli Zaretskii
  0 siblings, 0 replies; 18+ messages in thread
From: Eli Zaretskii @ 2022-10-28  7:30 UTC (permalink / raw)
  To: Po Lu; +Cc: mituharu, bernat, 43128-done

> From: Po Lu <luangruo@yahoo.com>
> Cc: Vincent Bernat <bernat@luffy.cx>,  43128@debbugs.gnu.org,
>   mituharu@math.s.chiba-u.ac.jp
> Date: Fri, 28 Oct 2022 08:38:25 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Po Lu, can you please review the proposed patch and decide what to do
> > about this issue?  Or maybe it is already fixed in some other way on
> > master?
> 
> The patch LGTM, and no, the issue hasn't yet been fixed on master AFAIK.

Thanks.  So I've now installed the changes, and I'm closing the bug.





^ permalink raw reply	[flat|nested] 18+ messages in thread

* bug#43128: Changed the font selection after 52d4c98cec0901ef5cc1c55d5b3b33ac9d9c519f
  2020-08-31  7:31 bug#43128: 27.1; DPI change not detected after switching to Emacs 27.1 Vincent Bernat
       [not found] ` <handler.43128.B.15988596567523.ack@debbugs.gnu.org>
@ 2022-10-29 12:30 ` OGAWA Hirofumi
  1 sibling, 0 replies; 18+ messages in thread
From: OGAWA Hirofumi @ 2022-10-29 12:30 UTC (permalink / raw)
  To: 43128

Hi,

The change of 52d4c98cec0901ef5cc1c55d5b3b33ac9d9c519f (Fix detection of
DPI changes in builds without Xft) looks like changes font selection in
my config, and strange behavior.


(defvar user-default-font-name "DejaVu Sans Mono")
(create-fontset-from-fontset-spec
 (concat "-*-" user-default-font-name "-*-*-*-*-12-*-*-*-*-*-fontset-user"))
;; Use IPAGothic for japanese
(dolist (target '(japanese-jisx0213.2004-1
		  japanese-jisx0213-2
		  japanese-jisx0213-1
		  japanese-jisx0212
		  japanese-jisx0208
		  japanese-jisx0208-1978
		  katakana-jisx0201))
  (set-fontset-font "fontset-user" target "IPAGothic"))
(setq default-frame-alist       
      (append '((font . "fontset-user")) default-frame-alist))


With above config, the initial frame uses unifont (unexpected) as
japanese font. But then, "C-x 5 2" and the second frame uses IPAGothic
(expected) as japanese font.

Reverting 52d4c98cec0901ef5cc1c55d5b3b33ac9d9c519f resolves this issue
(restore old behavior).

Thanks.


In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.16.0) of 2022-10-29 built on devron
Repository revision: f826f56a413a07eee2782655809e1f5e102c6153
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Debian GNU/Linux bookworm/sid

Configured using:
 'configure --with-x-toolkit=gtk3 --without-xim --with-imagemagick
 --with-wide-int --with-native-compilation=aot'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ
IMAGEMAGICK JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2
M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XINPUT2
XPM GTK3 ZLIB

Important settings:
  value of $LANG: ja_JP.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
  gnus-topic-mode: t
  gnus-undo-mode: t
  coterm-mode: t
  shell-dirtrack-mode: t
  flycheck-pos-tip-mode: t
  global-flycheck-mode: t
  global-company-mode: t
  company-mode: t
  auto-insert-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  electric-pair-mode: t
  savehist-mode: t
  icomplete-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/usr/local/share/emacs/site-lisp/git-modes/git-modes-autoloads hides /usr/local/share/emacs/site-lisp/elpa/git-modes-20220422.1611/git-modes-autoloads

Features:
(shadow bbdb-message mailalias emacsbug mule-util sort gnus-cite
shr-color color mm-archive mail-extr textsec uni-scripts idna-mapping
ucs-normalize uni-confusable textsec-check gnus-async gnus-bcklg
bbdb-gnus-aux qp gnus-ml gnus-topic pp url-http url-gw url-cache utf-7
epa-file network-stream nsm nnfolder bbdb-gnus nnnil bbdb-mua spam
spam-stat bbdb-com crm bbdb bbdb-site timezone gnus-uu yenc gnus-demon
gnus-delay gnus-draft gnus-agent gnus-srvr gnus-score score-mode
nnvirtual nntp gnus-cache gnus-msg gnus-art mm-uu mml2015 mm-view
mml-smime smime gnutls dig gnus-sum shr pixel-fill kinsoku url-file svg
dom nndraft nnmh gnus-xoauth2 oauth2-ext plstore gnus-group gnus-undo
gnus-start gnus-dbus dbus xml gnus-cloud nnimap nnmail mail-source utf7
nnoo parse-time iso8601 gnus-spec gnus-int gnus-range message sendmail
yank-media puny rfc822 mml mml-sec epa derived epg rfc6068 epg-config
mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045
ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus nnheader
gnus-util time-date mail-utils range mm-util mail-prsvr wid-edit
dired-aux dircolors-faces dired-x dired dired-loaddefs comp comp-cstr
warnings icons company-yasnippet flyspell ispell server bbdb-loaddefs
auth-source-pass rfc-autoloads url-auth debian-autoloads
langtool-autoloads generic-x coterm compat compat-macs term disp-table
shell pcomplete ehelp git-modes-autoloads flycheck-relint relint compile
text-property-search comint ansi-osc xr flycheck-pos-tip pos-tip
flycheck ansi-color find-func rx dash company-cscope company-oddmuse
company-keywords company-etags etags fileloop generator xref project
ring company-gtags company-dabbrev-code company-dabbrev company-files
company-clang company-capf company-cmake company-semantic
company-template company-bbdb company pcase autoinsert cl-extra
yasnippet help-mode elec-pair savehist browse-kill-ring delsel
tab-bar-session desktop frameset icomplete mozc-popup popup
mozc-im-indicater mozc-im advice mozc company-autoloads coterm-autoloads
compat-autoloads csv-mode-autoloads expand-region-autoloads
flycheck-autoloads info dash-autoloads gnuplot-autoloads
lua-mode-autoloads markdown-mode-autoloads php-mode-autoloads
popup-autoloads pos-tip-autoloads rust-mode-autoloads xr-autoloads
yaml-mode-autoloads package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie generate-lisp-file
url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv
bytecomp byte-compile url-vars cl-loaddefs cl-lib japan-util rmc
iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win
term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe
tabulated-list replace newcomment text-mode lisp-mode prog-mode register
page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors
frame minibuffer nadvice seq simple cl-generic indonesian philippine
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite emoji-zwj charscript
charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure
cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp
files window text-properties overlay sha1 md5 base64 format env
code-pages mule custom widget keymap hashtable-print-readable backquote
threads dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty
make-network-process native-compile emacs)

Memory information:
((conses 16 489068 36963)
 (symbols 48 25661 12)
 (strings 32 109898 13110)
 (string-bytes 1 3282391)
 (vectors 16 86583)
 (vector-slots 8 1735684 54385)
 (floats 8 407 247)
 (intervals 56 1970 370)
 (buffers 984 28))

-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>





^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2022-10-29 12:30 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-31  7:31 bug#43128: 27.1; DPI change not detected after switching to Emacs 27.1 Vincent Bernat
     [not found] ` <handler.43128.B.15988596567523.ack@debbugs.gnu.org>
2020-09-02  7:28   ` bug#43128: Acknowledgement (27.1; DPI change not detected after switching to Emacs 27.1) Vincent Bernat
2020-09-02  7:51     ` Vincent Bernat
2020-09-02  7:58     ` YAMAMOTO Mitsuharu
2020-09-02  8:20       ` Vincent Bernat
2020-09-02 14:16         ` Eli Zaretskii
2020-09-02 18:10           ` Vincent Bernat
2020-09-02 14:18       ` Eli Zaretskii
2020-11-23 17:36         ` Eli Zaretskii
2021-07-18 21:38           ` Vincent Bernat
2021-07-19 12:03             ` Eli Zaretskii
2021-07-19 12:09               ` Vincent Bernat
2022-10-25 21:02                 ` Vincent Bernat
2022-10-27 16:33                   ` Eli Zaretskii
2022-10-27 16:55                     ` Vincent Bernat
2022-10-28  0:38                     ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-28  7:30                       ` Eli Zaretskii
2022-10-29 12:30 ` bug#43128: Changed the font selection after 52d4c98cec0901ef5cc1c55d5b3b33ac9d9c519f OGAWA Hirofumi

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